Really?
A video by Biden trying to placate Hillary fans (who McCain smartly tried to pull away by picking Palin) is him saying Obama can't lead?
As far as the surge goes, which is what that video is about; hindsight is 20/20. There are a bunch of clips of Obama saying beforehand he doesn't think the surge will work, and then a bunch of clips of other people, after the fact, saying it worked. The surge did have a good effect, as far as I can tell, but it's sort of silly to present Obama's opinion before the fact next to other's opinions afterwards.
How about the fact that McCain supported the war in Iraq because he thought there were WMD? Obama was against it from the start...which is a bigger blunder; dragging the nation into a costly war, or questioning a troop surge once that war is ongoing?
As far as caring for the troops goes:
http://www.youtube.com/watch?v=cGoB4_mJnsY